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engines/ultima/ultima8/gfx/raw_shape_frame.h

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+/* ScummVM - Graphic Adventure Engine
+ *
+ * ScummVM is the legal property of its developers, whose names
+ * are too numerous to list here. Please refer to the COPYRIGHT
+ * file distributed with this source distribution.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#ifndef ULTIMA8_GFX_RAW_SHAPEFRAME_H
+#define ULTIMA8_GFX_RAW_SHAPEFRAME_H
+
+namespace Ultima {
+namespace Ultima8 {
+
+struct ConvertShapeFormat;
+struct ConvertShapeFrame;
+
+/**
+ * A raw shape frame just contains references into the (possibly compressed)
+ * data for the shape and is used as an intermediate step in the loading
+ * process.
+ */
+class RawShapeFrame {
+	friend class ShapeFrame;
+public:
+
+	// parse data.
+	//
+	// You will find this is quite similar to the ConvertShapeFrame except
+	// all the unknown crap is removed. It's designed to allow for painting
+	// only, and for speed when loading.
+
+	RawShapeFrame(const uint8 *data, uint32 size, const ConvertShapeFormat *format = 0,
+	           const uint8 special[256] = 0, ConvertShapeFrame *prev = 0);
+	~RawShapeFrame();
+
+	void getConvertShapeFrame(ConvertShapeFrame &csf);
+
+private:
+
+	uint32              _compressed;
+	int32               _width, _height;
+	int32               _xoff, _yoff;
+
+	uint32              *_line_offsets;      // Note these are offsets into rle_data
+	const uint8         *_rle_data;
+
+	// This will load a u8 style shape 'optimized'.
+	void loadU8Format(const uint8 *data, uint32 size);
+
+	// This will load a pentagram style shape 'optimized'.
+	void loadPentagramFormat(const uint8 *data, uint32 size);
+
+	// This will load any sort of shape via a ConvertShapeFormat struct
+	// Crusader shapes must be loaded this way
+	void loadGenericFormat(const uint8 *data, uint32 size, const ConvertShapeFormat *format);
+
+	// This will load a u8-compressed shape
+	void loadU8CMPFormat(const uint8 *data, uint32 size, const ConvertShapeFormat *format, const uint8 special[256], ConvertShapeFrame *prev);
+};
+
+} // End of namespace Ultima8
+} // End of namespace Ultima
+
+#endif